“Cost of Medications, Preference and Willingness-to-Pay for Pain Relief Among Adult Patients Diagnosed With Acute and Chronic Musculoskeletal Pain Conditions”. Acta Medica Philippina 54, no. 5 (October 28, 2020). Accessed April 5, 2025. https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/2260.